Shadow depth cues and endoscopic task performance.
Shadow depth cues and endoscopic task performance.
复制标题
阴影深度线索和内窥镜任务表现。
DOI：
10.1001/archsurg.137.10.1166
复制
发表时间：
2002
影响因子：
--
通讯作者：
A. Cuschieri
中科院分区：
文献类型：
--
作者：
G. Hanna;A. Cresswell;A. Cuschieri
假设
HYPOTHESIS
A shadow-inducing laparoscopic system improves task performance.
DESIGN
Experimental study was carried out using the Dundee Endoscopic Psychomotor Tester for objective assessment of task performance. The standard exercise consisted of passing a probe through 37 holes on the target plate in a random order. Shadow was induced by using separate ports for illumination and imaging of the target plate. Light direction-to-target (LDT) angles of 90 degrees, 75 degrees, and 60 degrees were investigated with each of the 90 degrees and 75 degrees optical axis-to-target view angles.
SETTING
Research laboratory at the Surgical Skills Unit, Ninewells Hospital.
PARTICIPANTS
Twenty medical students with no previous exposure to laparoscopic surgery.
MAIN OUTCOME MEASURES
Success score, execution time, the force applied on the target, and angular deviations of the probe.
RESULTS
With a 90 degrees optical axis-to-target angle, there was improvement in the success score using either 75 degrees or 60 degrees LDT angles compared with a 90 degrees LDT angle (P =.02, P =.01, respectively), but the execution time became longer (P =.008, P =.03, respectively). With a 75 degrees optical axis-to-target angle, there was improvement in the success score (P<.001), execution time (P<.001, P =.03, respectively), and horizontal and vertical deviations (P<.001) on using either 90 degrees or 60 degrees LDT angles compared with a 75 degrees LDT angle.
CONCLUSION
Endoscopic task performance significantly improves with a system that provides illumination and shadows in the operative field.